“The worst part about this is that I look like I'm the one that's hacking him,” says Jennifer.

Denying that she has had anything to do with the hacking, Jennifer claims she’s called internet providers, the FBI, Homeland Security, the Secret Service, and even hired a private investigator, but says “Nobody has been able to help me.”

“At this point,” says Jennifer, “I'm determined, and I'm relentless. And I will clear my name.

Who does Jennifer say she believes may be behind the hacking, and why does Billy say he is “One-hundred percent sure” that it’s Jennifer?

Part one of this two-part Dr. Phil airs Thursday. Check here to find out where you can watch